eXant BI v1.6 with SQL Server Express 2012 SP1 x64 (1.1 GB)
Best if you have a server with Windows Server 2012 / Windows 8, in x64 architecture.

eXant BI v1.6 with SQL Server Express 2008 R2 SP2 x64 (360 MB)
Best if you have a server with Windows Server 2008 / Windows 7 or older, in x64 architecture.

eXant BI v1.6 with SQL Server Express 2008 R2 SP2 x86 (340 MB)
Best if you have a server with Windows Server 2008 / Windows 7 or older, in x86 architecture.

eXant BI v1.6 with all SQL Server databases (2.8 GB)
Best if you are not sure which database to install yet. Contains SQL Server 2008 R2 SP2 x86/x64 and SQL Server 2012 SP1 x86/x64.